Thanks UKVIKING
I am talking about a very generaic Project (any IT Project)
Even I have added Start Date, End Date and the complete schedule of the project also scope of project and etc. in my project plan

I am prity much sure that I have considered almost all the details about the Project just want to know that I am not missing anything.

Viking's question is valid.
If we are talking about implementing ITIL project, you will have to make a strategic plan to address the following questions:
- Are you going to implement all ITIL processes?
- If so, what would be the suitable approach? (process by process, etc.)
- If "by process" is chosen, would it be one project for one process?

Plus, this forum is not a Project Management Forum, so asking about Project Management in detail here would not help you anything.